Runs in your browser ยท nothing uploaded
Bulk VIN checker
Paste up to 1,000 VINs (one per line, or comma separated). Each is checked for length, illegal characters, the ISO 3779 check digit, model year and manufacturer - instantly, on your device.
Your list never leaves this page. Decode a single VIN in full on the decoder.
Who is this for?
Dealers auditing inventory lists, fleet managers cleaning spreadsheets, developers sanity-checking imports. Anywhere a mistyped VIN costs time downstream.
Failed VINs?
Each invalid row links straight to the VIN fixer, which uses the check digit to suggest the corrected VIN.
Need full build sheets?
The free API returns the complete decode (make, model, engine, plant) for one VIN per request, cached and never logged.
Frequently Asked Questions
Everything you need to know about checking VINs in bulk
How many VINs can I check at once?
Up to 1,000 per run. Validation happens entirely in your browser, so it is instant and there is no account, quota or upload.
Are my VINs uploaded anywhere?
No. The check digit, model year and manufacturer checks run on your device using a local copy of the manufacturer registry. Your list never leaves the browser.
What does the bulk checker verify?
For each VIN: length, illegal characters (I, O, Q), the ISO 3779 check digit, the encoded model year and the manufacturer (from the first three characters, the WMI). It does not fetch full build sheets, decode individual VINs on the homepage for that.
Can I export the results?
Yes, one click downloads the full results table as a CSV file, generated locally in your browser.